If you ______ firm action to deal with it at once, you wouldn’t suffer heavy losses tomorrow.

—What does the sign over there read?—"No person          smoke or carry a lighted cigarette, cigar or pipe in this area．"

(2013·陕西高考)The children ________ lost in the woods; otherwise, they would have been at the lakeside camp as scheduled.

If you＿＿＿＿wait a moment, I’ll go and find our manager. 

(2013·陕西师大附中模拟)If we had taken such effective measures much earlier, the river ________ so seriously now.